Formaldehyde in rain water in Mexico City atmosphere
Main Article Content
Abstract
Measurements of formaldehyde in rain water were perfonned at the National University of Mexico during the rainy seasons of 1981 and 1982. A total of 71 samples from storms and prolonged rains were analyzed. The results obtained throughout this study gave an average of 0.479 ± 0.19 mg/1, much higher than those reported in rain water by different authors formaritime and clean coastal air. The statistical program "cross tabulation" applied to CH2O concentrations, indicated a linear correlation only between the CH2O concentrations, sunshine hours and the time when precipitation began. The high CH2O values found in rain water indicated a much greater source than that provided by the methane oxidation. Motor vehicles emissions and the huge combustion of fuel oil are the obvious candidates for the additional.CH2O sources in the atmosphere of Mexico City.
Publication Facts
Reviewer profiles N/A
Author statements
- Editor & editorial board
- profiles
- Academic society
- Geofísica Internacional
To learn about these publication facts, click 
PF is maintained by the Public Knowledge Project
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
References
BAEZ, A. and H. PADILLA, The acidity of rain water over the Mexico City Valley (to be published).
BARBER, E. D. and J. P. LODGE, Jr., 1963. Paper chromatographic identification of carbonyl compounds as their 2-3 dinitriphenylhydrozones in automobile exhaust. Analyt. Chem., 35, 348-350. DOI: https://doi.org/10.1021/ac60196a024
CALVERT, J. G., J. A. KERR, K. L. DEMERJIAN and R. D. McQUIGG, R. D., 1972. Photolysis of formaldehyde as a hydrogen atom source in the lower atmosphere, Science, 175, 751-752. DOI: https://doi.org/10.1126/science.175.4023.751
CLEVELAND, W. S., T. E. GRAEDEL and B. KLEINER, 1977. Urban formaldehyde: observed correlation with source emissions and photochemistry. Atmos. Environ. 11, 357-360. DOI: https://doi.org/10.1016/0004-6981(77)90164-0
GROSJEAN, D., 1982. Formaldehyde and other carbonyle in Los Angeles ambient air. Environ. Sci. Technol., 16, 254-262. DOI: https://doi.org/10.1021/es00099a005
KLIPPEL, W., and P. WARNECK, 1978. Formaldehyde in rain water and on the atmospheric aerosol. Geophys. Res. Lett., 5, 177-179. DOI: https://doi.org/10.1029/GL005i003p00177
LEVY, H., 1971. Normal atmosphere: large radical of formaldehyde concentrations predicted, Science, 173, 141-143. DOI: https://doi.org/10.1126/science.173.3992.141
NASH, T., 1953. The colorimetric estimation of formaldehyde by means of the hantzsech reaction. Biochem. J., 55, 416-420. DOI: https://doi.org/10.1042/bj0550416
O'DONNELL, A. and A. DRAVNIECKS, 1970. Chemical species in engine exhaust and their contributions to exhaust odors. Report No. 11 TRI (6183.5 IIT), Research Institute, Chicago, III.
SELLERS, W.D., 1965. Physical Climatology. The University of Chicago Press. Chicago, I11.
SHEARER, E. C., 1969. Relationships between atmospheric formaldehyde, methane and kripton. Ph. D. Thesis, The University of Arkansas.
THOMPSON, A., 1980. Wet and dry removal of tropospheric formaldehyde at a coast line. Tellus, 32, 376-383. DOI: https://doi.org/10.1111/j.2153-3490.1980.tb00964.x
WARNECK, P., 1975. OH production rates in the troposphere. Planet. Space Sci., 23, 1507-1511. DOI: https://doi.org/10.1016/0032-0633(75)90004-5
ZAFIRIOU, O. C., J. ALFORD, M. HERRERA and E. T. PELTZER, 1980. Formaldehyde in remote marine air and rain: Flux measurements and estimates. Geophys. Res. Lett., 7, 341-344. DOI: https://doi.org/10.1029/GL007i005p00341